Download ginac/cln archive instead of using git repo #161

Job	Run time
Minimal dependencies Tests (Debug)	9m 46s
Test and Deploy (Debug)	6m 5s
Distro Tests (debian-12, Debug)	6m 5s
Minimal dependencies Tests (Release)	9m 7s
Test and Deploy (Release)	5m 46s
Distro Tests (debian-12, Release)	5m 42s
Distro Tests (ubuntu-22.04, Debug)	5m 26s
Distro Tests (ubuntu-22.04, Release)	4m 52s
Distro Tests (ubuntu-24.04, Debug)	6m 14s
Distro Tests (ubuntu-24.04, Release)	5m 49s
Email notification	2s
	1h 4m 54s

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